@if 1 + 1 == 2 {}

@if 1 + 1 == 2 {}
@else if 1 + 1 == 3 {}

@if 1 + 1 == 2 {}
@else if 1 + 1 == 3 {}
@else { color: red }

@for $i from 1 through 3 {}

@while $i > 0 {}

@each $animal in puma, sea-slug, egret, salamander {}

@each $animal, $color, $cursor in (puma, black, default), (sea-slug, blue, pointer) {}

@each $header, $size in (h1: 2em, h2: 1.5em, h3: 1.2em) {}